CN113563760A - Electrothermal ink, preparation method thereof and electrothermal product - Google Patents
Electrothermal ink, preparation method thereof and electrothermal product Download PDFInfo
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- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 2
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/146—Conductive polymers, e.g. polyethylene, thermoplastics
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention discloses an electrothermal ink, a preparation method thereof and an electrothermal product, wherein the electrothermal ink comprises a main material and an auxiliary agent, wherein the main material comprises 5-15% by mass of a conductive material, 30-50% by mass of a water-based resin and 50-65% by mass of water, the conductive material comprises hydrophilic graphene and a carbon nano tube dispersion liquid, and the carbon nano tube dispersion liquid comprises graphene oxide and a carbon nano tube; in the carbon nanotube dispersion liquid, the mass ratio of graphene oxide to carbon nanotubes is 0.1-0.8: 1, the mass concentration of the carbon nano tube is 3-8%. According to the invention, the hydrophilic graphene and the carbon nano tube dispersion liquid are used as main materials of the electrothermal ink, the water-based resin is used as a bonding agent to ensure the flexibility and the adhesive force of the electrothermal ink, and the formed electrothermal ink is a water-based dispersion system, is beneficial to film formation on a hydrophilic substrate, can radiate infrared rays, has good electrothermal conversion performance and stability, and has good application prospects in infrared physiotherapy electrothermal products.
Description
Technical Field
The invention relates to the technical field of electric heating materials, in particular to electric heating ink, a preparation method thereof and an electric heating product.
Background
With the accelerated industrialization process in China, the influence of the life style and ecological environment of residents on health gradually appears, the health and chronic diseases of human bodies gradually increase, the consciousness of people on health gradually improves, and a novel efficient, convenient and healthy treatment physical therapy mode becomes the key point for medical treatment and public attention. The human body is used as a natural far infrared radiation source and absorber and mainly absorbs far infrared rays with the wavelength of 3.5-15.6 microns, and far infrared rays emitted by far infrared physiotherapy stimulate the stretching vibration of carbon-carbon and carbon-hydrogen in cell molecules to generate resonance waves with the wavelength close to that of the far infrared rays emitted by the human body, so that the human body channels and collaterals are dredged, and the effects of physiotherapy, tumor prevention and sub-health adjustment are achieved. At present, various far infrared radiation sources exist in the market for products of far infrared physiotherapy, if heating wires are used as heat sources, the defects of poor heating effect, nonuniform heating, low infrared radiation rate and unstable products exist.
Disclosure of Invention
In view of the above, it is desirable to provide an electrothermal ink, a method for preparing the same, and an electrothermal product.
The first aspect of the application provides an electrothermal ink, which comprises a main material and an auxiliary agent, wherein the main material comprises, by mass, 5-15% of a conductive material, 30-50% of a water-based resin and 50-65% of water, the conductive material comprises hydrophilic graphene and a carbon nanotube dispersion liquid, and the carbon nanotube dispersion liquid comprises graphene oxide and carbon nanotubes; in the carbon nanotube dispersion liquid, the mass ratio of graphene oxide to carbon nanotubes is 0.1-0.8: 1, the mass concentration of the carbon nano tube is 3-8%.
The graphene material can release 6-15 microns of far infrared under the electrified condition, and the far infrared wave band is almost the same as that absorbed by a human body, the hydrophilic graphene material is used in the electric heating ink provided by the embodiment of the application, on one hand, the graphene material can be used as a high-conductivity and high-radiation material, on the other hand, the dispersion in water is good, the uniform dispersion of the electric heating ink is favorably improved, the carbon nano tube dispersion liquid is prepared by using the amphiphilic graphene oxide for dispersion, the problem that the carbon nano tube is difficult to disperse is solved, meanwhile, the addition amount of the graphene oxide is controlled to be lower than the quality of the carbon nano tube, and the high-conductivity and high-radiation performance of the carbon nano tube dispersion liquid is improved on the premise of ensuring the uniform dispersion of the carbon nano tube. This application uses hydrophilicity graphite alkene and carbon nanotube dispersion as the main material of electric ink, guarantees electric ink's pliability and adhesive force as the binder with water-based resin, and the electric ink that forms is aqueous disperse system, does benefit to the film forming on the hydrophilicity base, can radiate the infrared ray and have better electrothermal conversion performance and stability simultaneously, has better application prospect in infrared physiotherapy electric heat product.
According to some embodiments of the electrothermal ink, the hydrophilic graphene has 2 to 5 layers and a size of 100 to 500 nm.
According to some embodiments of the electrothermal ink of the present application, the aqueous resin is selected from at least one of silicone-modified acrylic resin, epoxy-modified acrylic resin, and polyurethane.
According to some embodiments of the present application, the additive comprises an antifoaming agent and a leveling agent.
According to the electrothermal ink, the mass of the defoaming agent accounts for 0.2-0.5% of the mass of the main material based on the mass of the main material.
According to some embodiments of the electrothermal ink of the present application, the antifoaming agent is selected from AT least one of BYK028, BYK077, AT-990, and TCB-1.
According to some embodiments of the electrothermal ink, the mass of the leveling agent accounts for 0.2-1.0% of the mass of the main material based on the mass of the main material.
According to some embodiments of the present application, the leveling agent is at least one selected from digan 245, digan 100, BYK 378.
The second aspect of the present application provides a method for preparing the above electrothermal ink, comprising the following steps:
carrying out first electrolysis by taking a sulfate solution as an electrolyte, taking a first electrode as an anode and a second electrode as a cathode, then carrying out electrode alternation to adjust the first electrode as the cathode and the second electrode as the anode, continuing to carry out second electrolysis, and repeatedly carrying out electrode alternation to carry out electrolysis to obtain hydrophilic graphene, wherein the voltage of the first electrolysis and the voltage of the second electrolysis are both 5-20V, the alternation period of the electrode alternation is 1-10 min, and the first electrode and the second electrode are both selected from graphite rods or graphene sheets;
taking graphene oxide and a carbon nanotube solution, and uniformly dispersing to obtain a carbon nanotube dispersion solution;
uniformly dispersing the hydrophilic graphene and the carbon nanotube dispersion liquid to obtain a conductive material;
and (3) uniformly dispersing the conductive material, the water-based resin, the water and the auxiliary agent to obtain the electrothermal ink.
According to the preparation method provided by the embodiment of the application, the graphite rod or the graphene sheet is used as the electrode, the cathode and the anode are alternately adjusted, the sulfate is used as the electrolyte in the electrolysis process, the two electrodes can be stripped to form the hydrophilic graphene under the low-voltage electrolysis condition, the efficiency is improved, the carbon nano tube is dispersed by using the graphene oxide solution, the problem that the carbon nano tube is poor in dispersibility in water is solved, and the prepared hydrophilic graphene and carbon nano tube dispersion liquid can be well dispersed in water, so that the improvement of the dispersion uniformity of the electrothermal ink is facilitated.
According to the preparation method of some embodiments of the present application, the total time of repeating the first electrolysis and the second electrolysis is 5 to 10 hours.
According to some embodiments of the present disclosure, the sulfate salt in the sulfate solution is selected from Na2SO4、K2SO4At least one of sodium dodecyl sulfate and sodium dodecyl benzene sulfonate.
According to some embodiments of the present disclosure, the dispersing is performed by at least one selected from blending, stirring, and ultrasound.
In a third aspect of the present application, an electrothermal product is provided, which includes a substrate and a coating layer coated on the substrate, wherein the material of the coating layer is the electrothermal ink.
According to some embodiments of the electric heating product according to the present application, the substrate is selected from any one of polyimide, polyethylene terephthalate, textile fibers.
According to some embodiments of the invention, the coating is applied to the substrate by gravure or screen printing.
According to some embodiments of the electrothermal product of the present application, a protective film is further coated on the coating layer to protect the electrothermal ink from physical or chemical damage.
According to some embodiments of the invention, the coating is a patterned coating. According to the circuit design, the electric heating ink can generate heat and radiate infrared rays after being switched on after being applied with voltage along a patterned layer formed by a designed circuit, and can be used as an infrared physiotherapy product.
Drawings
FIG. 1 is an electron microscope image of hydrophilic graphene prepared by an electrolytic method;
FIG. 2 is an IR spectrum of an electrothermal ink according to example 1;
FIG. 3 is an infrared spectrum of an electrothermal ink according to example 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The electrothermal ink provided by the embodiment of the application is prepared according to the following steps:
s1, preparing hydrophilic graphene: and performing first electrolysis by taking a sulfate solution as an electrolyte, taking a first electrode as an anode and a second electrode as a cathode, then performing electrode alternation to adjust the first electrode as the cathode and the second electrode as the anode, continuing to perform second electrolysis, and repeating the electrode alternation to perform electrolysis to obtain the hydrophilic graphene, wherein the first electrode and the second electrode are both selected from graphite rods or graphene sheets.
Taking the first electrode and the second electrode as the example of graphite rods, connecting the first electrode and the second electrode with the positive electrode and the negative electrode of a power supply respectively, wherein the first electrode is the positive electrode, the second electrode is the negative electrode, performing first electrolysis after the power supply is switched on, performing electrochemical stripping on the graphite rods serving as the first electrode, performing electrode alternation after the electrolysis is performed for a period of time, adjusting the first electrode to be the negative electrode after the electrolysis alternation, adjusting the second electrode to be the positive electrode, and performing electrochemical stripping on the graphite rods serving as the second electrode. Electrode alternation is carried out repeatedly like this, can make the graphite rod as first electrode and the graphite rod as the second electrode carry out electrochemical stripping in turn, has promoted the efficiency of preparation hydrophilicity graphite alkene. The electrode alternation mode can be as follows: when a direct-current power supply is adopted, the electrodes connected with the positive electrode and the negative electrode of the direct-current power supply are exchanged, namely the graphite rod originally connected with the positive electrode of the direct-current power supply is adjusted and connected with the negative electrode of the power supply, and the graphite rod originally connected with the negative electrode of the direct-current power supply is adjusted and connected with the positive electrode; or an alternating current power supply is adopted, and the electrode alternation is automatically generated when the current direction is changed.
The number of the hydrophilic graphene sheets formed by stripping by the electrolysis method is 2-5, and the size of each sheet is 100-500 nm.
S2, preparing a carbon nano tube dispersion liquid: and uniformly mixing the graphene oxide and the carbon nanotube solution, and dispersing the carbon nanotubes by using the graphene oxide to prepare the carbon nanotube dispersion solution.
In some embodiments, the ratio of the added mass of the graphene oxide to the mass of the carbon nanotubes in the carbon nanotube dispersion is controlled to be 0.1-0.8: 1, the mass concentration of the carbon nano tube is 3-8%. In some embodiments, the size of the graphene oxide is 10-100 nm, the graphene oxide is used as a dispersing agent and is in recognition bonding with the carbon nano tube through pi-pi conjugation, and carboxyl and hydroxyl at the edge of the graphene oxide are connected with water molecules, so that the dispersibility of the carbon nano tube is improved. The size of the used graphene oxide is 20-100 nm.
And S3, mixing the prepared hydrophilic graphene and the carbon nano tube dispersion liquid, and uniformly dispersing to form the conductive material.
In some embodiments, the hydrophilic graphene and the carbon nanotube dispersion can be mixed by blending, stirring, ultrasound, and the like.
And S4, uniformly dispersing the conductive material, the water-based resin, the water and the auxiliary agent to form the electrothermal ink.
The waterborne resin is used as a bridge for forming a conductive network by conductive particles, is a framework of a conductive coating, the performance of the waterborne resin directly influences the service life and the electric heating performance of the coating, the epoxy resin has strong adhesive force to a base material, but the appearance and the weather resistance of a paint film are poor, the amino resin is easy to crosslink, the paint film is hard and brittle, the acrylic resin is generally suitable for products with low product quality requirements, the polyurethane resin is polymerized by polyisocyanate and polyol, and the final performance of the polyurethane is determined by the type and the proportion of polyisocyanate and polyol monomers. The comprehensive performance of the polyurethane is optimal by comprehensively comparing different resins, and the polyurethane has solvent resistance and chemical resistance. The prepared electric heating ink can be used for preparing electric heating products, a circuit layer is arranged on a base material through circuit design, then the electric heating ink is printed and prepared on the circuit layer in a gravure or silk-screen printing mode, and the like, and then a protective film is covered and hot-pressed on the electric heating ink to prepare the electric heating products. The prepared electric heating product can radiate far infrared rays, can be switched on and off by using low voltage of 5-36V, and can be used as a far infrared electric heating physiotherapy product.
The following description will be given with reference to specific examples.
Example 1
Preparing hydrophilic graphene: selecting Na2SO4And as an electrolyte, a graphite flake is taken as a first electrode, and a second electrode is respectively connected with the positive electrode and the negative electrode of a direct current power supply to carry out first electrolysis, wherein the voltage of the direct current power supply is 10V. Then, exchanging two graphite sheets connected with the positive electrode and the negative electrode of the direct current power supply, performing electrode alternation, performing secondary electrolysis, controlling the alternation period of the electrode alternation to be 1min, and performing continuous electrolysis for 5h to obtain hydrophilic graphene;
preparing a carbon nano tube dispersion liquid: dispersing the carbon nano tubes by using 20-50 nm graphene oxide, and controlling the mass ratio of the added graphene oxide to the carbon nano tubes to be 0.2:1 and the mass concentration of the carbon nano tubes to be 5%;
blending the prepared hydrophilic graphene and the carbon nano tube dispersion liquid, and then stirring at 1500r/min to obtain a conductive material;
10 parts by mass of a conductive material, 45 parts by mass of waterborne polyurethane, 45 parts by mass of water, 0.2 part by mass of a defoaming agent and 1 part by mass of a leveling agent digao 450 are taken, and stirred and dispersed at a high speed to obtain the electrothermal ink.
And (3) printing the prepared electric heating ink on a PET (polyethylene terephthalate) film in a screen printing mode through circuit design, and preparing an electric heating product through hot-pressing a protective film.
Fig. 1 shows an electron microscope image of the hydrophilic graphene prepared by the electrolytic method in this example, and it can be seen from the electron microscope image that the number of layers of the hydrophilic graphene is 2-5, and the size is 100-500 nm.
Example 2
Preparing hydrophilic graphene: selecting SDS (sodium dodecyl sulfate) and K2SO4And as an electrolyte, a graphite flake is taken as a first electrode, and a second electrode is respectively connected with the positive electrode and the negative electrode of a direct current power supply to carry out first electrolysis, wherein the voltage of the direct current power supply is 10V. Then, two graphite sheets connected with the positive electrode and the negative electrode of the direct current power supply are exchanged to carry out electrode alternation, secondary electrolysis is carried out, the alternation period of the electrode alternation is controlled to be 1min, and the total time of continuous electrolysis is 5hObtaining hydrophilic graphene;
preparing a carbon nano tube dispersion liquid: dispersing the carbon nano tubes by using 50-100 nm graphene oxide, and controlling the mass ratio of the added graphene oxide to the carbon nano tubes to be 0.5:1 and the mass concentration of the carbon nano tubes to be 8%;
blending the prepared hydrophilic graphene and the carbon nano tube dispersion liquid, and then stirring at 1800r/min to obtain a conductive material;
taking 8 parts by mass of a conductive material, 30 parts by mass of waterborne polyurethane, 62 parts by mass of water, 0.2 part by mass of a defoaming agent BYK028, 0.2 part by mass of a defoaming agent BYK077 and 0.5 part by mass of a leveling agent Digao 245, and stirring and dispersing at a high speed to obtain the electrothermal ink.
And (3) printing the prepared electric heating ink on a PI (polyimide) film in a screen printing mode through circuit design, and preparing an electric heating product through hot-pressing a protective film.
The electrothermal inks prepared in the embodiments 1 and 2 were subjected to infrared spectrum tests, and the infrared spectra thereof were measured as shown in fig. 1 and 2, respectively, from which it can be seen that the electrothermal inks provided herein can radiate far infrared rays and can be applied to infrared physiotherapy products.
The electric heating products of example 1 and example 2 were measured for their performance, and the results are shown in Table 1.
TABLE 1 Property parameters of the electrothermal inks of example 1 and example 2
According to Ohe tunneling conduction theory, as the coating is electrified at higher temperature, the conductive filler tends to have a NTC (negative temperature coefficient) effect with a decreasing resistance value as the temperature increases. According to the Kohler volume expansion theory, the resin matrix expands along with the rise of temperature, the volume fraction of the conductive filler and the distance between filler particles change along with the temperature, so that the distance between the filler particles is increased, the PTC effect is generated, the NTC effect (positive temperature coefficient effect) of the conductive filler along with the rise of temperature is inhibited, if the conductive filler and the filler particles are not matched stably, the product is easy to be unstable, and only according to the requirements of the product, the proportion of the conductive filler and the resin is reasonably determined, so that the conductive filler and the resin are relatively balanced, and the electrothermal stability of the electrothermal ink forming coating can be ensured. Referring to table 1, the electric heating products provided in examples 1 and 2 provided by the present application both have better electric heating stability, and the resistance of the electric heating products can be adjusted by adjusting the addition ratio of the conductive filler and the resin. The printing substrates of the embodiment 1 and the embodiment 2 are different, and the waterborne polyurethane selected by the application can be connected with PET or PI through hydrogen bonds, so that the electrothermal ink has excellent adhesive force on the substrate. The electric heating product provided by the embodiment of the application has high normal phase total reflectivity, the resistance change rate is only 2% after being folded for 100 times at 180 degrees, and the electric heating product has excellent bending resistance. In addition, the electric heating product provided by the application has the power change of only-5% after being electrified for 60 hours under the rated voltage of 1.35 times, and has longer service life. Graphene and carbon nano tubes are uniformly dispersed in the electric heating ink, three-dimensional conductive network lapping is realized, and the prepared electric heating product has high electric heating conversion efficiency and temperature uniformity.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The electrothermal ink is characterized by comprising a main material and an auxiliary agent, wherein the main material comprises 5-15% by mass of a conductive material, 30-50% by mass of a water-based resin and 50-65% by mass of water, the conductive material comprises hydrophilic graphene and a carbon nano tube dispersion liquid, and the carbon nano tube dispersion liquid comprises graphene oxide and carbon nano tubes; in the carbon nanotube dispersion liquid, the mass ratio of graphene oxide to carbon nanotubes is 0.1-0.8: 1, the mass concentration of the carbon nano tube is 3-8%.
2. The electrothermal ink according to claim 1, wherein the hydrophilic graphene has 2 to 5 layers and a layer size of 100 to 500 nm.
3. The electrothermal ink of claim 1, wherein the aqueous resin is at least one selected from silicone-modified acrylic resin, epoxy-modified acrylic resin, and polyurethane.
4. An electrothermal ink according to any one of claims 1 to 3, wherein the auxiliary agent comprises an antifoaming agent and a leveling agent.
5. A method of preparing an electrothermal ink according to any one of claims 1 to 4, comprising the steps of:
carrying out first electrolysis by taking a sulfate solution as an electrolyte, taking a first electrode as an anode and a second electrode as a cathode, then carrying out electrode alternation to adjust the first electrode as the cathode and the second electrode as the anode, continuing to carry out second electrolysis, and repeatedly carrying out electrode alternation to carry out electrolysis to obtain hydrophilic graphene, wherein the voltage of the first electrolysis and the voltage of the second electrolysis are both 5-20V, the alternation period of the electrode alternation is 1-10 min, and the first electrode and the second electrode are both selected from graphite rods or graphene sheets;
taking graphene oxide and a carbon nanotube solution, and uniformly dispersing to obtain a carbon nanotube dispersion solution;
uniformly dispersing the hydrophilic graphene and the carbon nanotube dispersion liquid to obtain a conductive material;
and (3) uniformly dispersing the conductive material, the water-based resin, the water and the auxiliary agent to obtain the electrothermal ink.
6. A method of producing an electrothermal ink according to claim 5, wherein the total time of repeating the first electrolysis and the second electrolysis is 5 to 10 hours.
7. A method of making an electrothermal ink according to claim 5, wherein the sulfate in the sulfate solution is selected from Na2SO4、K2SO4At least one of sodium dodecyl sulfate and sodium dodecyl benzene sulfonate.
8. The method for preparing electrothermal ink according to claim 5, wherein the dispersing manner is at least one selected from blending, stirring and ultrasound.
9. An electrothermal product comprising a substrate and a coating layer on the substrate, wherein the material of the coating layer is the electrothermal ink of any one of claims 1 to 4.
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